ByteScout Premium Suite – C# – Parse Invoice

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ByteScout Premium Suite – C# – Parse Invoice

printable version:
ByteScout-Premium-Suite-C-sharp-Parse-Invoice.pdf

How to parse invoice in C# with ByteScout Premium Suite

How to write a robust code in C# to parse invoice with this step-by-step tutorial

Sample source code below will display you how to manage a complex task like parse invoice in C#. ByteScout Premium Suite is the set that includes 12 SDK products from ByteScout including tools and components for PDF, barcodes, spreadsheets, screen video recording and you can use it to parse invoice with C#.

The following code snippet for ByteScout Premium Suite works best when you need to quickly parse invoice in your C# application. IF you want to implement the functionality, just copy and paste this code for C# below into your code editor with your app, compile and run your application. This basic programming language sample code for C# will do the whole work for you to parse invoice.

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Program.cs

      using System;
using System.Drawing;
using Bytescout.PDFExtractor;

namespace InvoiceParsing
{
	/// <summary>
	/// This example demonstrates parsing and data extraction from typical invoice.
	/// </summary>
	class Program
	{
		static void Main(string[] args)
		{
			// Create TextExtractor instance
			TextExtractor textExtractor = new TextExtractor("demo", "demo");
			textExtractor.WordMatchingMode = WordMatchingMode.ExactMatch; // Set exact search (default is SmartSearch that works like in Adobe Reader)

			// Create XMLExtractor instance
			XMLExtractor xmlExtractor = new XMLExtractor("demo", "demo");

			// Load document
			textExtractor.LoadDocumentFromFile("Invoice.pdf");
			xmlExtractor.LoadDocumentFromFile("Invoice.pdf");

			// Results
			string invoiceNo = string.Empty;
			string invoiceDate = string.Empty;
			string total = string.Empty;
			string tableData = string.Empty;

			// Iterate pages
			for (int i = 0; i < textExtractor.GetPageCount(); i++)
			{
				RectangleF pageRectangle = textExtractor.GetPageRectangle(i);
				RectangleF tableRect = new RectangleF(0, 0, pageRectangle.Width, 0);

				// Search for "Invoice No."
				if (textExtractor.Find(i, "Invoice No.", false))
				{
					// Get the found text rectangle
					RectangleF textRect = textExtractor.FoundText.Bounds;
					// Assume the text at right is the invoice number.
					// Shift the rectangle to the right:
					textRect.X = textRect.Right;
					textRect.Width = pageRectangle.Right - textRect.Left;
					// Set the extraction region and extract the text
					textExtractor.SetExtractionArea(textRect);
					invoiceNo = textExtractor.GetTextFromPage(i).Trim();
				}
				
				// Search for "Invoice Date" and extract text at right
				if (textExtractor.Find(i, "Invoice Date", false))
				{
					RectangleF textRect = textExtractor.FoundText.Bounds;
					textRect.X = textRect.Right;
					textRect.Width = pageRectangle.Right - textRect.Left;
					textExtractor.SetExtractionArea(textRect);
					invoiceDate = textExtractor.GetTextFromPage(i).Trim();
				}

				// Search for "Quantity" keyword to detect the top of the tabular data rectangle
				if (textExtractor.Find(i, "Quantity", false))
				{
					// Keep the top table coordinate
					tableRect.Y = textExtractor.FoundText.Bounds.Top; // use textRect.Bottom if you want to skip column headers
				}
				
				// Search for "TOTAL" (it will be also the bottom of tabular data rectangle)
				if (textExtractor.Find(i, "TOTAL", true /* case sensitive! */)) 
				{
					RectangleF textRect = textExtractor.FoundText.Bounds;
					textRect.X = textRect.Right;
					textRect.Width = pageRectangle.Right - textRect.Left;
					textExtractor.SetExtractionArea(textRect);
					total = textExtractor.GetTextFromPage(i).Trim();

					// Calculate the table height
					tableRect.Height = textRect.Top - tableRect.Top;
				}

				// Extract tabular data using XMLExtractor
				if (tableRect.Height > 0)
				{
					xmlExtractor.SetExtractionArea(tableRect);
					tableData = xmlExtractor.GetXMLFromPage(i);
				}
			}

			// Display extracted data
			Console.WriteLine("Invoice No.: " + invoiceNo);
			Console.WriteLine("Invoice Date: " + invoiceDate);
			Console.WriteLine("TOTAL: " + total);
			Console.WriteLine("Table Data: ");
			Console.WriteLine(tableData);

			Console.WriteLine("Press any key...");
			Console.ReadKey();
		}
	}
}